- (a.) Pertaining to the hypothetical upper, purer air or to the higher regions beyond the earth or beyond the atmosphere; celestial; as, ethereal space; ethereal regions.
- (a.) Pertaining to, derived from or resembling, ether; as, ethereal salts.
- (a.) Consisting of ether; hence, exceedingly light or airy; tenuous; spiritlike; characterized by extreme delicacy, as form, manner, thought, etc.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). ethereal. Retrieved September 23, 2026, from http://smartdefine.org/ethereal/definitions/2004975 |
| Chicago | Webster's. 2011. "ethereal" http://smartdefine.org/ethereal/definitions/2004975 (accessed September 23, 2026). |
| Harvard | Webster's 2011, ethereal, Smart Define, viewed 23 September, 2026, <http://smartdefine.org/ethereal/definitions/2004975>. |
| MLA | Webster's. "ethereal" 27 May 2011. Web. 23 September 2026. <http://smartdefine.org/ethereal/definitions/2004975> |